inner join problem

I have two tables:
* JobInfo - gives information about each job
* Employees - lists employees and their information

In each job, I need to create an entry that assigns a draftsman and a salesperson to each project (in the JobInfo table). I can't figure out how to join both the salesperson and the draftman fields to the employees table. Can somebody tell me what I'm doing wrong? Thanks in advance for the help.

Below is my code:

Code:

$result= mysql_query ("
SELECT JobInfo.SystemNumber, JobInfo.dwgnumber, JobInfo.quotenumber, JobInfo.ponumber, JobInfo.jobnumber, JobInfo.salesperson, JobInfo.draftsman, Employees.empID, Employees.empfirstname, 
Employees.emplastname, JobInfo.store, Store.storeID, Store.storecity, Store.storestate, customers.ID, customers.firstname, customers.lastname
FROM JobInfo 
INNER JOIN Employees ON JobInfo.salesperson=Employees.empID AND JobInfo.draftsman=Employees.empID
INNER JOIN Store ON JobInfo.store=Store.storeID
INNER JOIN customers ON Store.owner=customers.ID
ORDER BY dwgnumber DESC Limit 10 
") or die (mysql_error());

 

You need to use table aliases

Code:

SELECT j.SystemNumber, j.dwgnumber, j.quotenumber, j.ponumber, j.jobnumber, j.salesperson, j.draftsman, e1.empID, e1.empfirstname, 
e1.emplastname, e2.empID, e2.empfirstname, 
e2.emplastname, j.s, s.sID, s.scity, s.sstate, c.ID, c.firstname, c.lastname
FROM JobInfo j 
INNER JOIN Employees e1 ON j.salesperson=e1.empID
INNER JOIN Employees e2 ON j.draftsman=e2.empID
INNER JOIN Store s ON j.s=s.sID
INNER JOIN customers c ON s.owner=c.ID
ORDER BY dwgnumber DESC Limit 10 

 

Thank you so much! I never realized you could do that. You've been a tremendous help!